But we tart with the breaking news out of California, 5.1 magnitude earthquake centered in northern Orange county with more than 20 aftershocks may have been relatively moderate but this quake is a particular concern to seismologists and ABC's Ryan Owens is in Brea, California, with more. Good morning. Reporter: Good morning to you. We're about an hour east of downtown Los Angeles, very close to the epicenter. This road is closed because of one of those rock slides we talked about and with all of those aftershocks overnight, it's been a very long night here. The quake did more than rattle nerves it sent bottles flying off store shelves, mirrors crashing to the ground. When I felt it I felt like the world was going to end. Reporter: It wasn't the big one but it was big enough. Magnitude its epicenter south of los Angeles in Orange county, the oc. Near the city of la habra. It wasn't strong enough to cause major structural damage or injuries but did trigger a small rock slide that overturned this car. The driver is okay. A few water main breaks were also blamed often the quake. The ground shook just after 9:00 Friday night. In the sixth inning of the dodgers game. We might be experiencing an earthquake I should say. Everyone just sat still. Is that happening? Reporter: It comes less than two weeks after news anchors ducked for cover. Earthquake. We're having an earthquake. So no wonder southern californians are on edge. Still, this is L.A. So plenty of people tweeted about their earthquake experience and, yes, some even took some not so steady selfies as the ground was shaking. Now, as we mentioned seismologists are particularly worried about this quake because they think this fault may be reawakening. We haven't heard from this particular fault, they don't think, in several decades. They believe this is the same fault responsible for the Whittier quake in the 1980s that killed 8 people and caused more than $350 million in damage. Bianna, the reason they don't want to see this fault wake up again, it runs right through downtown L.A. Yeah, the second largest city in the country, Ryan, our thanks to you.

This transcript has been automatically generated and may not be 100% accurate.

Earthquake Shakes Los Angeles

LA fire department begins search for damage and injuries.

Los Angeles Earthquake 20 Years Ago

It's been 20 years since a 6.7 earthquake shook Los Angeles, killing more than 50 people.

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